NGX’s New Technology Converts Waste Graphite Fines into High-Value Battery Material

Innovative Value-Add Process Transforms Waste into Opportunity

NGX Limited (ASX:NGX) has announced a significant technological advancement in its downstream graphite processing, successfully converting previously rejected fines material into high-value spherical graphite (SG). This breakthrough not only increases the volume of active anode material (AAM) produced but also enhances the quality of graphite destined for lithium-ion battery applications.

The new process addresses a longstanding inefficiency in graphite production, the disposal or low-value sale of fines generated during the shaping or spheronisation phase. Traditionally, these fines have been relegated to the steel industry as recarburisers, commanding lower prices. NGX’s innovative approach transforms these fines into spherical graphite with a D50 particle size of 10.7 microns, a tap density of 0.985, and a BET-specific surface area of 7.3 m2/g, all within industry-accepted benchmarks.

Technical Collaboration and Market Implications

This advancement results from collaborative testwork with leading international technology partners, underscoring NGX’s commitment to leveraging global expertise to refine its Malingunde Graphite Project in Malawi. The process has already demonstrated a 24% increase in overall yields, with further optimization underway to enhance both yield and the production of finer-sized spherical graphite (targeting D50 around 8-12 microns). Such finer graphite is highly prized for high-power and fast-charging battery segments, often commanding premium pricing.

Executive Director Peter Fox highlighted the potential impact: "This technology could significantly enhance project economics by converting rejected fines into high-value spherical graphite. We are excited by the progress and look forward to further optimization and electrochemical performance assessments." The first batch of finer-sized SG samples has been dispatched for purification testing, with results expected shortly, marking a critical next step in validating the commercial viability of this process.

Sustainability and Efficiency Gains

Beyond economic benefits, the process also improves sustainability by reducing waste and maximizing resource utilization. By converting what was once a low-value by-product into a marketable precursor anode material, NGX aligns with increasing industry demands for environmentally responsible and efficient battery material production.

SEM imaging reveals the characteristic 'potato-shaped' spherical graphite particles formed from agglomerates of smaller particles, a morphology expected to facilitate improved lithium-ion diffusion, a key performance metric for battery anode materials.

Looking Ahead

NGX’s ongoing downstream program, supported by rigorous metallurgical testwork and pilot plant operations, positions the company well to meet growing demand in the lithium-ion battery sector. The ability to produce higher yields of premium spherical graphite from natural flake graphite feedstock could provide NGX with a competitive edge as battery manufacturers seek reliable, high-quality anode materials.

As NGX continues to refine this process and validate its electrochemical properties, market watchers will be keen to see how these developments translate into commercial-scale production and off-take agreements. The company’s focus on both yield improvement and product quality enhancement signals a strategic approach to unlocking the full value of its Malingunde asset.